Temporary header file '/tmp/D1SlfWAheN/dump1.h' with the following content will be compiled to create GCC translation unit dump:

  // add defines
  #define __STDC_VERSION__ 201710L
#define _GXX_NULLPTR_T
#define CLUTTER_ENABLE_COMPOSITOR_API 1
#define _REGEX_NELTS(n)
#define _Atomic
#define PACKED
#ifdef __cplusplus
// C17 compat layer
#define _Alignof(type) alignof(type)
#endif
#define getaddrinfo_a(a,b,c,d) 
#define SSLBUFLEN 8192
typedef float _Float32;
typedef double _Float64;
typedef float _Float32x;
typedef long double _Float64x;
typedef void SSLSTREAM;

  // add includes
  #include "/usr/include/stdio.h"
  #include "/usr/include/c-client/c-client.h"
  #include "/usr/include/c-client/env.h"
  #include "/usr/include/c-client/fdstring.h"
  #include "/usr/include/c-client/flocksim.h"
  #include "/usr/include/c-client/flstring.h"
  #include "/usr/include/c-client/imap4r1.h"
  #include "/usr/include/c-client/netmsg.h"
  #include "/usr/include/c-client/newsrc.h"
  #include "/usr/include/c-client/os_lnx.h"
  #include "/usr/include/c-client/pseudo.h"
  #include "/usr/include/c-client/sslio.h"
  #include "/usr/include/c-client/tcp_unix.h"
  #include "/usr/include/c-client/unix.h"

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -U__cplusplus -D_Bool="bool" -fpreprocessed -x c++ -fpermissive -w "/tmp/D1SlfWAheN/dump1.i"